Alert, warning and emergency notices

Emergency notices are issued when operating reserves or transmission capacity limitations threaten the ability of the California ISO to safely and reliably operate the grid. All notices should be confirmed with the appropriate operating personnel prior to taking any action.

Go to our Notification sign-ups page to find out how to sign up to receive alert, warning and emergency notices.

Grid history and facts

Grid Emergency History is a compilation of No Touch, Alert, Warning, Emergency, and conservation declarations and Peak Load History is the annual peak load since 1998.